观光温室结构楔形箱型矩管柱梁连接节点抗震性能  

Seismic performance of wedge-shaped box joint of beam and box column in tourism greenhouse structures

作　　者：李晓润[1,2] 宋波[1] 陈水荣[2] 

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《农业工程学报》2017年第10期252-257,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"项目(2009AA0323);国家科技支撑计划课题(2012BAJ13B01)

摘　　要：为了满足温室结构的建设需要,提出了一种楔形箱型矩管柱与H形钢梁连接节点构造型式,并对该种节点的抗震性能进行研究。利用ANSYS对该节点进行了往复荷载作用下的有限元模拟分析,讨论了钢梁翼缘、腹板厚度及矩管柱壁厚对钢节点抗震性能的影响。结果表明,楔形箱型节点在往复荷载作用下梁端塑性铰位置向跨中偏移,保证了"强柱弱梁、强节点弱构件"设计理念的实现。累积耗能比传统的外联板式节点高出25.40%,比内隔板式节点减少20.46%,滞回曲线相对饱满,体现了良好的抗震性能。同时,梁翼缘和腹板的厚度及楔形箱形截面宽度变化率对于节点的抗震性能有较大的影响,建议实际工程中截面宽度变化率取1:4。计算结果表明该节点具有良好的抗震性能。In order to meet the requirement of the greenhouse structure construction, a wedge-shaped box joint connecting box column and H-shaped beam was proposed to overcome the inconvenient construction and poor seismic performance of the conventional joint in the H-shaped beam and box section column, such as the conventional outboard plate joint and the internal baffles joint. The finite element simulation analysis of the joints under cyclic loading was carried out by the finite element analysis software ANSYS. The seismic performance of the joint was analyzed and compared with the conventional outboard plate joint and the internal baffles joint. The influences of the flange and web thickness of the beam, and the thickness of the rectangular tube column on the seismic performance of the joint were discussed. The seismic performance of the wedge-shaped box joint was better than that of the outboard plate joint, so it could be applied to the actual engineering instead of the conventional outboard plate joint. The cumulative energy consumption was 25.40% higher than that of the outboard plate joint, and 20.46% lower than that of the internal baffles joint. The stiffness of the wedge-shaped box joint was larger than that of the outboard plate joint. The hysteretic curve of the joint was relatively full, which embodied the good seismic performance. The plastic hinge of the internal baffles joint appeared at about 200 mm outside the column edge. The plastic hinge of the wedge-shaped box joint and the outboard plate joint was about 450 and 500 mm outside the column edge, respectively. However, the region area in the wedge-shaped box joint was smaller than the other joints. The plastic hinge position of the wedge-shaped box joint moved to the middle of the span under cyclic loadings, which ensured the design concept of ＂strong column with weak beam, strong node with weak component＂. The thickness of the flange and web of the wedge-shaped box joint had a great influence on the seismic performance. In the case of no exceeding

关 键 词：温室 有限元分析 模型 刚性 梁柱节点 滞回曲线 抗震性能 非线性分析 

分 类 号：S625[农业科学—园艺学]